The apple watch is now a stand alone music player, only able to play music stored/synced on it. You can no longer choose your phone as the source, I can't believe they made that change. It was super usefull to iniate musics either with siri or from a single tap on the now playing complication, nope its now only synced music and you also need headphones paired to it. I used the watch alot in my car with siri and my bluetooth receiver to start and change music easily, without reaching for my phone.